Try this prayer verse:  Psalm 37:4  Delight thyself in the Lord, and He shall give three the desires of your heart. The verse talks about prayer, but does not use the word or phrase “prayer”.   This gets to what is essential with prayer – delighting ourselves with the Lord.  This means the Lord’s will, the Lord’s desires, the Lord’s intentions, and of course the Lord’s Word.

Consider this verse in Isaiah  58:13,14  13 ” If you turn away your foot from the Sabbath, [From] doing your pleasure on My holy day, And call the Sabbath a delight, The holy [day] of the LORD honorable, And shall honor Him, not doing your own ways, Nor finding your own pleasure, Nor speaking [your own] words,   14 Then you shall delight yourself in the LORD; And I will cause you to ride on the high hills of the earth, And feed you with the heritage of Jacob your father. The mouth of the LORD has spoken.”  That’s a big verse that defines making ourselves happy in the Lord.